Arsenal prospect broke through last season, but next year should be the one fans get really excited for.
His performances attracted speculation he could crack Germany's World Cup squad, and even courted transfer interest from Borussia Dortmund.
It was a very low-key end to the year for Gnabry however, who did not make a single appearance following his cameo against Bayern Munich in early March in the Champions League.
Arsene Wenger's decision to rest him may have been frustrating for him considering Theo Walcott's injury, but if he looks at the similar situation of Raheem Sterling, he should take the positive parallels.
Sterling broke into Liverpool's first team in early 2012/13, but after showing signs of weariness, manager Brendan Rodgers left him out from February onwards and sent him back to the under-21s.
A year later and Sterling has re-emerged as a bona fide star, a full England international with a World Cup under his belt, and the key factor in Liverpool's rejuvenated attack nearly clinching the Premier League trophy, scoring nine times and assisting five goals.
The rest did him the world of good, with Rodgers keen to avoid burnout, and Wenger is also wise to pick and choose his times to feature Gnabry.
There is a strong chance the German comes back this season and has a similar effect to Sterling, and makes himself undroppable in the Arsenal set up.
His talent is undeniable, with his pace, power and creativity making him already far too good for under-21 football.
He will get chances in pre-season thanks to several established stars having extended breaks due to World Cup action, and that is his chance to lay down a marker to Arsene Wenger.
There is a strong prospect that if Gnabry gets his opportunity this coming season he will grasp it, enjoy a second season every bit as strong as Sterling, and become Arsenal's x-factor in their hunt for trophies.